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At What Angle with the Normal to the Surface of the Water

Question 17

Multiple Choice

At what angle with the normal to the surface of the water must a beam of light enter the water so that the refracted beam makes an angle of 10 ∘\circ to the normal of the water?


A) 10 ∘\circ
B) 13 ∘\circ
C) 15 ∘\circ
D) 17 ∘\circ
E) 20 ∘\circ

Correct Answer:

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